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Re: Tired Of Double Clutching???????
marvin ribbich #1075380 Thu Dec 25 2014 07:50 PM
Joined: Nov 2006
Posts: 2,658
D
Shop Shark
Thanks for posting some pictures, its sure going to help people wanting to do the same.

Re: Tired Of Double Clutching???????
marvin ribbich #1075497 Fri Dec 26 2014 07:32 PM
Joined: May 2001
Posts: 1,434
W
Shop Shark
Tim,

I'm 700 miles distant from the truck with family, but I'm pretty sure I use the 80W-90 gear lube.


1948 3/4-Ton 5-Window Flatbed Chevrolet

28 Years of Daily Driving. Now with a '61 261, 848 head, Rochester Monojet carb, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
Re: Tired Of Double Clutching???????
marvin ribbich #1075502 Fri Dec 26 2014 08:41 PM
Joined: Sep 2001
Posts: 30,014
ace skiver

Wally,

That gear oil is good, unless it is synthetic oil or hypoid oil.

Here is Novak Conversions' recommendation:

When filling your 420 with gear oil, we recommend that you select a conventional mineral oil or a para-synthetic in lieu of a full synthetic oil. Properly assembled manual gearboxes do not have the thermal strains seen by combustion engines or hypoid gears. Synthetic fluid in these gearboxes, while not harmful, is probably an economic waste.

Hypoid gear oil is sulphurized higher than transmission oil and can be mildly corrosive to the non-ferrous alloys used for synchros, bushings and thrust washers in these transmissions.

An 80W-90, API-GL5 or MT-1 rated fluid is very good. Some claim faster shifts from using a 50W engine oil in their transmission and we do not consider this to be contraindicated unless you operate your vehicle in a very warm environment.



Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
Z-series (54/55) GMC 350 (2-ton) COE [1954advance-design.com] - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Re: Tired Of Double Clutching???????
marvin ribbich #1077017 Sat Jan 03 2015 01:30 PM
Joined: Apr 2005
Posts: 361
M
Shop Shark
I had a few bolters call with questions about the 3 holes in the original bracket that the 1" shaft goes through. They need to be taped with a 3/8" 16 tap no need to drill the holes before tapping they will tap just fine. Again any questions on the making or installation of the adaptor just give me a call. 1-262-392-2989

Marv.

Last edited by marvin ribbich; Sat Jan 03 2015 01:33 PM.
Re: Tired Of Double Clutching???????
marvin ribbich #1087009 Sat Feb 21 2015 01:46 PM
Joined: Apr 2005
Posts: 361
M
Shop Shark
btt

Re: Tired Of Double Clutching???????
marvin ribbich #1096494 Thu Apr 09 2015 10:23 PM
Joined: Apr 2005
Posts: 361
M
Shop Shark
btt

Re: Tired Of Double Clutching???????
marvin ribbich #1109074 Fri Jun 19 2015 01:39 PM
Joined: Apr 2005
Posts: 361
M
Shop Shark
btt

Re: Tired Of Double Clutching???????
marvin ribbich #1118868 Thu Aug 13 2015 01:48 PM
Joined: Apr 2005
Posts: 361
M
Shop Shark
btt

Re: Tired Of Double Clutching???????
marvin ribbich #1118904 Thu Aug 13 2015 04:50 PM
Joined: Jul 2013
Posts: 983
Shop Shark
Marvin,

Change your gear oil to straight 90 weight mineral based gear oil. This usually cures the double clutch problems 90% of the time, unless you have syncho problems. Got the straight 90 weight gear oil at NAPA.

Hope this helps.

Tim


"Pay attention to the details! It ALWAYS pays off."

1949 Chevrolet 3100 Series 1/2 ton Pickup
1964 Chevrolet C10 (Ol' Yella) (SOLD)
1958 Chevrolet Biscayne 2 door (SOLD)
1970 VW Beetle
Re: Tired Of Double Clutching???????
marvin ribbich #1139827 Thu Dec 17 2015 01:12 PM
Joined: Apr 2005
Posts: 361
M
Shop Shark

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